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User name R. Michaels
Log entry time 04:36:16 on August25,2009
Entry number 285795
keyword=oversampling not working
We tried oversampling. It's not working.
If we run with just the counting room crate it works
If we run with a config "RightHap" which has R-HRS HAPPEX
crate plus counting room, we get a lot of deadtime. During
the access I looked at the monitor output and saw some MPS
periods had the N samples, while others were flat. (When
not oversampling the mon-out looked normal, thankfully.)
If I ran with oversample-by-2 and internal timing on the ADC18
it seemed to work fine. My impression is it's a problem with
the timing board.
Things to try tomorrow (i.e. later today):
1. Try oversampling on TestCrate ADC18s. We might learn something
(Well, we did it before). First try 1 ADC, then 2, then 3, etc.
2. Swap out the HAPPEX timer on R-HRS.